chore: convert unit tests from Alsatian to NodeJS built-in framework (RocketChat#37592)

Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>
Co-authored-by: d-gubert <1810309+d-gubert@users.noreply.github.com>

Author: d-gubert

packages/apps-engine/package.json

@@ -51,7 +51,7 @@
 		".:lint:deno": "deno lint --ignore=deno-runtime/.deno deno-runtime/",
 		".:lint:eslint": "eslint .",
 		".:test:deno": "cd deno-runtime && deno task test",
-		".:test:node": "NODE_ENV=test ts-node --transpileOnly ./tests/runner.ts",
+		".:test:node": "NODE_ENV=test node --require ts-node/register/transpile-only --test-reporter spec --test \"tests/**/*.test.ts\"",
 		"build": "run-s .:build:clean .:build:default .:build:deno-cache",
 		"dev": "yarn .:build:default --watch",
 		"fix-lint": "yarn .:eslint:fix && yarn .:deno-fmt:fix",
@@ -98,7 +98,6 @@
 		"@types/semver": "^7.5.8",
 		"@types/stack-trace": "0.0.33",
 		"@types/uuid": "~10.0.0",
-		"alsatian": "^2.4.0",
 		"eslint": "~9.39.3",
 		"npm-run-all": "^4.1.5",
 		"nyc": "^17.1.0",

packages/apps-engine/src/server/accessors/SlashCommandsExtend.ts

@@ -8,7 +8,7 @@ export class SlashCommandsExtend implements ISlashCommandsExtend {
 		private readonly appId: string,
 	) {}
 
-	public provideSlashCommand(slashCommand: ISlashCommand): Promise<void> {
-		return Promise.resolve(this.manager.addCommand(this.appId, slashCommand));
+	public async provideSlashCommand(slashCommand: ISlashCommand): Promise<void> {
+		await this.manager.addCommand(this.appId, slashCommand);
 	}
 }